SELECT * FROM DBA_OBJECTS d WHERE d.ORACLE_MAINTAINED='Y' AND D.object_name LIKE 'WR%';

解决该报错的方法是：

1. 使用exp 导出

2.ctas的方法在不受限制的schema下创建表，然后导出该新建的表

3. use the DBMS_AUDIT_MGMT package of Audit Vault to manage and purge audit data (see Note 731908.1). This allows for the facility to move the AUD$ table out of the SYSTEM tablespace, which can negate the need to export the table.

注意：This issue also applies to other SYS owned auditing tables such as FGA_LOG$